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Police, city officials and Alexis' family joined together at the park to plead for help in her case.

"She was just the sweetest," said LaTonya Stacker, Alexis' aunt.

She and other members of the family were so grief-stricken that they could hardly speak.

"We are doing as well as we could possibly be doing right now, just trying to hold up," said Glenn Mitchell, a cousin.

People in the community gathered around the family to embrace them and speak for them.

"This mother hurts today. Our mothers and fathers and family members are tired of hurting," said Rosilyn Temple of the victims' support group KC Mothers in Charge.

Alexis' school bus driver drove her bus to the vigil, decorated with her name and full of children who wanted to show support.

"I felt that was the best I could do," said the driver. "Bring her bus here. You know, Bus 56."

A big part of the vigil was to keep the case in the public eye so that police can find out who killed Alexis. Family members passed around photos to remind everyone that Alexis was a person, not just a crime victim. They urged anyone with information that might prove helpful to come forward.

"People who have information about this homicide and don't come forward and you don't tell police what happened, you're cowards, too," said Jackson County Prosecutor Jean Peters Baker.

Members of the Kansas City Police Department also promised justice for the family, saying that they don't just work in the community. They live there, too.

"It may not be today and it may not be tomorrow," one officer said, hoping the killer hears the message. "But we're coming to get you."

"It means everything to us to know that the whole community is behind us," Mitchell said.

At the vigil, speakers said that several Kansas City officials have donated to the Crime Stoppers reward fund, raising several thousand dollars more in hopes of finding the killer.

Anyone with information can make an anonymous call to the Crime Stoppers TIPS Hotline at 816-474-8477.